interpreting complex job specifications production problems that could eventuate by not reading and understanding the job specifications mounting and proofing flexographic plates OHS factors needing to be considered when mounting and proofing flexographic plates most common cause of photopolymer plates crazing on the image side resiliency of the printing plate main advantage of using thin photopolymer plates in process printing faults that may be detected on new plates types of solvents that should be used on photopolymer plates benefits of optical mounting purpose of binding plates after mounting possible print faults that could be eliminated by using cushion mount installation of printing cylinders or sleeves OHS factors that need to be considered when installing printing cylinders or sleeves precautions that should be undertaken to ensure that the plates and cylinders or sleeves are not damaged during installation checking to ensure plates and cylinders or sleeves have been installed correctly reel transportation system OHS precautions to be observed when webbing up the machine position of the reel how the substrate pulled into the machine result of insufficient unwind tension result of excessive unwind tens function of the "Dancer" roller on a web machine function of the PIV unit adjustments to the PIV function of the lay-on roller what will be the effect of excessive lay-on roller pressure what can happen if the web is not spliced correctly how does the particular web viewing device work delivery system OHS precautions that must be observed when setting up the delivery how web controlled in the rewind unit result of incorrect rewind tension remedial steps that can be taken if there is a possibility of the ink marking in the rewind function the use of air blast plays in the delivery of sheets preparing inks and additives OHS precautions that must be observed when preparing inks and additives necessary checks to test an ink's suitability for the printing process special end-use requirements that may be necessary main functions of a pigmented extender used in flexographic printing purpose of plasticisers added to flexographic inks additives used in flexographic inks range in seconds for zahn cup measurements effect foaming has in a zahn cup when measuring the ink viscosity recommended pH range when printing with aqueous inks precautions to observe to minimise waste when preparing the ink shelf life of most inks conditions are that relevant to the storage of inks and additives conventions that should be adhered to when labelling mixed ink complex machine set up OHS factors that need to be considered when setting up the machine advantage of centring all machine controls checks that should be made on cylinders and gears checks that should be performed prior to cylinder or sleeve installation angle that should the chamber blades be set at main advantage of gauging up and dry register prior to printing a job cell count of the anilox roller is used when printing solids water treatment additives used in a central impression drum and chill roller coolant system advantages of laser engraved ceramic anilox rollers things relating to the anilox roller that a roller scope will measure reasons for anilox wear type of job would be printed using a hexagonal cell configuration recommended web temperature when printing polypropylene film method of drying used when printing on polythene by the flexographic process factors affecting the drying rate of liquid inks factors affecting the drying of aqueous inks operating range of UV lamps in-line processes OHS precaution to be observed when slitting on the machine how is a cold seal formed reasons for a printed product to be punched setting hole punching in relation to repeat length result of excessive pressure on the slitters problem solving proofing and adjustment why is it necessary to graduate the drying speeds of each progressive colour, so that first-down colours dry faster the subsequent colours why is it that in flexographic printing as the press speed increases so does the colour strength decrease in web tension increasing rewind tension after the roll has been partially rewound major cause of a telescopic roll print characteristics related to excessive printing pressure causes of picking when printing multicoloured work print faults from using an over-reduced ink problems that can cause lateral streaks showing up in uneven printing causes of moire patterns when printing by the flexographic process result of air being trapped under mounted plates instrument used to identify retained solvent trapped in the print purpose of taking Dyne readings purpose of the crinkle test when testing an ink result if an excessive final drying temperature was used when printing polypropylene film property of ink that can be adjusted to reduce dot gain when checking the viscosity for ink whilst using ink pumps, why should the ink returning from the ink fountain not be used problems resulting from the excessive use of slow solvents why do laminating inks once printed appear dull and easy to scratch result of excessive print area tension problems that the printer may associate with cold seals machine manuals, safety and other documentation are relevant to this task and where are they kept and information is included in these documents
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